Did this last year but didn't go all the way into Washington.
Some highlights for us with my three boys.
Stay in the Redwoods. Spend at least two days there hiking the trails, we only did a full day and night and regret that part. So much to see and experience.
On the Oregon coast.....make sure to hit up my favorite towns on your way through.
Newport is awesome. If you like beer, Rogue Brewery is there and a great tasting room and restaurant. My favorite is double dead guy, if your a strong IPA fan. Rent some crab rings, get a day pass and crab off the docks. If you want and if we coordinate I can meet you there with my boat and catch crabs in the bay. Nothing beats fresh crab.
See the aquarium and walk the beaches.
Love Lincoln City as well. If you gamble they have a casino.
If you want to off-road some in the dunes, Florence is my favorite but also Coos Bay and Winchester Bay have dune access. Get a off-road tag and flag if you do.
Astoria is another must see in my opinion. The coast guard trains there and the goonie house is there, lots of history through the coast.
Tillamook has the cheese factory which is pretty cool, get some squeaky cheese and ice cream!
Good luck and sounds like a fun trip I'd repeat it again.
